Portion of an electronic mouse



FIG. 1 is a first perspective view of a portion of an electronic mouse showing our new design;

FIG. 2 is a second perspective view of a portion of an electronic mouse showing our new design;

FIG. 3 is a top view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a front elevational view thereof.

The broken line showing of the various regions is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of an electronic mouse, as shown and described. 